1 MCQs in Pediatrics for NEET PG
A 4-month-old male presents with poor feeding, sweating during feeds, tachypnea, and failure to thrive (weight dropping from 50th to 10th centile). On examination, he has a hyperdynamic precordium with a harsh pansystolic murmur at the left lower sternal border, a palpable thrill, and hepatomegaly. Chest X-ray shows cardiomegaly with pulmonary plethora. Transthoracic echocardiogram identifies the defect marked **A** in the diagram—a 6 mm perimembranous VSD adjacent to the tricuspid valve with a peak gradient of 60 mmHg and estimated RVSP of 40 mmHg. Which of the following is the PRIMARY PATHOPHYSIOLOGICAL CONSEQUENCE of the left-to-right shunt through the structure marked **A** that accounts for this infant's clinical presentation?
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